Long running code in OnTick appears to be CPU capped

I've got some long running code in OnTick that used to consume 100% of the CPU while getting its work done, since the last patch this appears to be capping at 25% exactly.

Any clues as to what's happened? Has something changed Rust side causing these issues that I've missed?

 

Perhaps you should consider a new approach that doesn't come in that heavy. What exactly are you trying to achieve?